<!DOCTYPE html>
<html lang="en">

<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>Document</title>
</head>
<style>
    *{
        padding: 0;
        margin: 0;
        box-sizing: border-box;
    }
    .con,.con2,.con3{
        width: 30vw;
        display: flex;
        flex-direction: column;
        align-items: flex-start;
        box-sizing: border-box;
    }

    .item {
        width: 30vw;
        background-color: red;
        margin-top: 5px;
    }
    .con{
        margin-left: 2vw;
    }
    .con2{
        margin-left: 34vw;
        margin-top: calc(-100vh + -15px);
        
    }
    .con3{
        margin-left: 66vw;
        margin-top: calc(-100vh + -15px);
    }
</style>

<body>
    <div class="con">
        <div class="item" style=" height: 30vh;"></div>
        <div class="item" style=" height: 20vh;"></div>
        <div class="item" style=" height: 50vh;"></div>
    </div>
    <div class="con2">
        <div class="item" style=" height: 40vh;"></div>
        <div class="item" style=" height: 30vh;"></div>
        <div class="item" style=" height: 30vh;"></div>
    </div>
    <div class="con3">
        <div class="item" style=" height: 30vh;"></div>
        <div class="item" style=" height: 30vh;"></div>
        <div class="item" style=" height: 40vh;"></div>
    </div>
    <!-- <div class="con">
        <div class="item" style="width: 30vw; height: 30vh;"></div>
        <div class="item" style="width: 30vw; height: 20vh;"></div>
        <div class="item" style="width: 30vw; height: 50vh;"></div>
        <div class="item" style="width: 30vw; height: 40vh;"></div>
        <div class="item" style="width: 30vw; height: 30vh;"></div>
        <div class="item" style="width: 30vw; height: 30vh;"></div>
        <div class="item" style="width: 30vw; height: 30vh;"></div>
        <div class="item" style="width: 30vw; height: 30vh;"></div>
        <div class="item" style="width: 30vw; height: 40vh;"></div>
    </div> -->
</body>

</html>